import pygame
import random
from game_items import *
from game_hud import *
from game_music import *

class Game(object):
    """游戏类"""
    def __init__(self):

        self.main_window = pygame.display.set_mode(SCREEN_RECT.size)
        pygame.display.set_caption("飞机大战")

        self.is_game_over = False
        self.is_pause = False

        #精灵组属性
        self.all_group = pygame.sprite.Group()
        self.enemies_group = pygame.sprite.Group()
        self.supplies_group = pygame.sprite.Group()

        #创建精灵
        #修改背景精灵，交替滚动
        self.all_group.add(Background(False),Background(True))

        #指示面板
        self.hud_panel = HudPanel(self.all_group)
        #创建敌机
        self.create_enemies()
        #英雄精灵
        self.hero = Hero(self.all_group)
        #设置面板中炸弹的数量
        self.hud_panel.show_bomb(self.hero.bomb_count)
        #创建道具
        self.create_supplies()
        # 创建音乐播放器
        self.player = MusicPlayer("game_music.ogg")
        self.player.play_music()

    
    def create_enemies(self):
        count = len(self.enemies_group.sprites())
        groups = (self.all_group,self.enemies_group)
        if self.hud_panel.level == 1 and count == 0:
            for i in range(16):
                Enemy(0,3,*groups)
        elif self.hud_panel.level == 2 and count == 16:
            for enemy in self.enemies_group.sprites():
                enemy.max_speed = 5
            for i in range(8):
                Enemy(0,5,*groups)
            for i in range(2):
                Enemy(1,1,*groups)
        elif self.hud_panel.level == 3 and count == 26:
            for enemy in self.enemies_group.sprites():
                enemy.max_speed = 7 if enemy.kind == 0 else 3
            for i in range(8):
                Enemy(0,7,*groups)
            for i in range(2):
                Enemy(1,3,*groups)
            for i in range(2):
                Enemy(2,1,*groups)

    def reset_game(self):
        """重置游戏"""
        self.is_game_over = False
        self.is_pause = False
        self.hud_panel.reset_panel()

        self.hero.rect.midbottom = HERO_DEFAULT_MID_BOTTOM

        for enemy in self.enemies_group:
            enemy.kill()
        for bullet in self.hero.bullets_group:
            bullet.kill()
        self.create_enemies()

    def event_handler(self):
        """事件监听
        :return:如果监听到退出事件，返回True，否则返回False
        """
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                return True
            elif event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE:
                return True
            elif event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE:
                if self.is_game_over:
                    self.reset_game()
                else:
                    self.is_pause = not self.is_pause
                    # 暂停或恢复背景音乐
                    self.player.pause_music(self.is_pause)
            # 判断是否正在游戏
            if not self.is_game_over and not self.is_pause:
                # 监听玩家按下字母 b,引爆炸弹
                if event.type == BULLET_ENHANCED_OFF_EVENT:
                    self.hero.bullets_kind = 0
                    pygame.time.set_timer(BULLET_ENHANCED_OFF_EVENT,0)
                #监听投放道具事件
                if event.type == THROW_SUPPLY_EVENT:
                    self.player.play_sound("supply.wav")
                    supply = random.choice(self.supplies_group.sprites())
                    supply.throw_supply()
                if event.type == HERO_FIRE_EVENT:
                    self.player.play_sound("bullet.wav")
                    self.hero.fire(self.all_group)
                if event.type == HERO_POWER_OFF_EVENT:
                    print("取消无敌状态。。。")
                    self.hero.is_power = False
                    pygame.time.set_timer(HERO_POWER_OFF_EVENT,0)
                #监听玩家按下字母b,引爆炸弹
                if event.type == pygame.KEYDOWN and event.key == pygame.K_b:
                    #如果英雄没有牺牲同时有炸弹
                    if self.hero.hp > 0 and self.hero.bomb_count > 0:
                        self.player.play_sound("use_bom.wav")
                    #引爆炸弹
                    score = self.hero.blowup(self.enemies_group)
                    #更新炸弹数量显示
                    self.hud_panel.show_bomb(self.hero.bomb_count)
                    #更新游戏得分，如果游戏等级提升，创建新的敌机
                    if self.hud_panel.increase_score(score):
                        self.create_enemies()
        return False

    def start(self):
        """开始游戏"""
        clock = pygame.time.Clock()
        frame_counter = 0
        while True:
            self.is_game_over = self.hud_panel.lives_count == 0
            if self.event_handler():
                self.hud_panel.save_best_score()
                return
            if self.is_game_over:
                #print("游戏已经结束，按空格键重新开始...")
                self.hud_panel.panel_pause(True,self.all_group)
            elif self.is_pause:
                #print("游戏已经暂停，按住空格键继续...")
                self.hud_panel.panel_pause(False,self.all_group)
            else:
                self.hud_panel.panel_resume(self.all_group)
                #碰撞检测
                self.check_collide()
                #通过pygame里key模块的get_pressed()方法获得当前时刻的按键元组
                keys = pygame.key.get_pressed()
                #判断是否按下右边方向键
                # if keys[pygame.K_RIGHT]:
                #     self.heo.rect.x += 10
                #水平移动基数
                move_hor = keys[pygame.K_RIGHT] - keys[pygame.K_LEFT]
                #垂直移动基数
                move_ver = keys[pygame.K_DOWN] - keys[pygame.K_UP]
                #修改逐帧动画计数器
                frame_counter = (frame_counter + 1) % FRAME_INTERVAL
                #更新 all_grpup.update(),更新所有精灵
                self.all_group.update(frame_counter == 0,move_hor,move_ver)
            #绘制 all_group 中所有精灵
            self.all_group.draw(self.main_window)
            pygame.display.update()
            clock.tick(60)
    
    def check_collide(self):
        """碰撞检测"""
        #检测英雄飞机和敌机的碰撞
        if not self.hero.is_power:
            enemies = pygame.sprite.spritecollide(self.hero,self.enemies_group,False,
                                                        pygame.sprite.collide_mask)
            enemies = list(filter(lambda x: x.hp > 0,enemies))       
            if enemies:
                #播放英雄被撞毁音效
                self.player.play_sound(self.hero.wav_name)
                self.hero.hp = 0
            for enemy in enemies:
                enemy.hp = 0

        hit_enemies = pygame.sprite.groupcollide(self.enemies_group,
                                                self.hero.bullets_group,
                                                False,
                                                False,
                                                pygame.sprite.collide_mask)
        for enemy in hit_enemies:
            if enemy.hp<=0:
                continue
            for bullet in hit_enemies[enemy]:
                bullet.kill()
                enemy.hp -= bullet.damage
                if enemy.hp > 0:
                    continue
                if self.hud_panel.increase_score(enemy.value):
                   #播放升级音效
                    self.player.play_sound("upgrade.wav")
                    self.create_enemies()
                #播放敌机爆炸音效
                self.player.play_sound(enemy.wav_name)
                break
            
        supplies = pygame.sprite.spritecollide(self.hero,
                                                self.supplies_group,
                                                False,
                                                pygame.sprite.collide_mask)
        if supplies:
            supply = supplies[0]
            #播放使用道具音效
            self.player.play_sound(supply.wav_name)
            #将道具设置到游戏窗口下方
            supply.rect.y = SCREEN_RECT.h
            if supply.kind == 0:
                self.hero.bomb_count += 1
                self.hud_panel.show_bomb(self.hero.bomb_count)
            else:
                self.hero.bullets_kind = 1
                pygame.time.set_timer(BULLET_ENHANCED_OFF_EVENT,20000)

    def create_supplies(self):
        Supply(0,self.supplies_group,self.all_group)
        Supply(1,self.supplies_group,self.all_group)
        pygame.time.set_timer(THROW_SUPPLY_EVENT,30000)


if __name__ == "__main__":
    pygame.init()
    Game().start()
    pygame.quit()


